Re: DVB-T2 Stick

Gonsolo
2019-10-01T22:19:21Z

[-- Attachment #1: Type: text/plain, Size: 548 bytes --]

Hi!

> Secondly there are lots of coding style issues, see:
> https://www.kernel.org/doc/html/v4.10/process/coding-style.html

I addressed most of these except one "#if 0" warning from checkpatch.

> I'm afraid there are many problems with this patch. First of all it looks
> like support was added for a si2168 tuner but it looks like it will break
> for any other si2157-type device.

Can you give me a hint how to proceed here? I don't know much about
DVB tuners or kernel development.

I attached the cleaned-up patch for 5.4.0-rc1

Thanks,
g

[-- Attachment #2: 0001-DVB-T2-with-coding-style-updates.patch --]
[-- Type: text/x-patch, Size: 5754 bytes --]

From 6cada6442207a67202e73721692aced665b8fdf0 Mon Sep 17 00:00:00 2001
From: Gon Solo <gonsolo@gmail.com>
Date: Tue, 1 Oct 2019 21:59:44 +0200
Subject: [PATCH] DVB-T2 with coding style updates.

---
drivers/media/tuners/si2157.c | 44 ++++++++++++++++++++++---
drivers/media/tuners/si2157_priv.h | 8 +++++
drivers/media/usb/dvb-usb-v2/af9035.c | 47 ++++++++++++++++++++++++++-
3 files changed, 93 insertions(+), 6 deletions(-)

diff --git a/drivers/media/tuners/si2157.c b/drivers/media/tuners/si2157.c
index e87040d6eca7..af50e721281b 100644
--- a/drivers/media/tuners/si2157.c
+++ b/drivers/media/tuners/si2157.c
@@ -75,7 +75,7 @@ static int si2157_init(struct dvb_frontend *fe)
struct si2157_cmd cmd;
const struct firmware *fw;
const char *fw_name;
- unsigned int uitmp, chip_id;
+ unsigned int uitmp;

dev_dbg(&client->dev, "\n");

@@ -117,7 +117,7 @@ static int si2157_init(struct dvb_frontend *fe)
if (ret)
goto err;
}
-
+#if 0
/* query chip revision */
memcpy(cmd.args, "\x02", 1);
cmd.wlen = 1;
@@ -138,6 +138,8 @@ static int si2157_init(struct dvb_frontend *fe)
#define SI2141_A10 ('A' << 24 | 41 << 16 | '1' << 8 | '0' << 0)

switch (chip_id) {
+#endif
+ switch (dev->chip_id) {
case SI2158_A20:
case SI2148_A20:
fw_name = SI2158_A20_FIRMWARE;
@@ -161,9 +163,9 @@ static int si2157_init(struct dvb_frontend *fe)
goto err;
}

- dev_info(&client->dev, "found a 'Silicon Labs Si21%d-%c%c%c'\n",
- cmd.args[2], cmd.args[1], cmd.args[3], cmd.args[4]);
-
+// dev_info(&client->dev, "found a 'Silicon Labs Si21%d-%c%c%c'\n",
+// cmd.args[2], cmd.args[1], cmd.args[3], cmd.args[4]);
+//
if (fw_name == NULL)
goto skip_fw_download;

@@ -456,6 +458,38 @@ static int si2157_probe(struct i2c_client *client,
memcpy(&fe->ops.tuner_ops, &si2157_ops, sizeof(struct dvb_tuner_ops));
fe->tuner_priv = client;

+ /* power up */
+ if (dev->chiptype == SI2157_CHIPTYPE_SI2146) {
+ memcpy(cmd.args, "\xc0\x05\x01\x00\x00\x0b\x00\x00\x01", 9);
+ cmd.wlen = 9;
+ } else {
+ memcpy(cmd.args,
+ "\xc0\x00\x0c\x00\x00\x01\x01\x01\x01\x01\x01\x02\x00\x00\x01",
+ 15);
+ cmd.wlen = 15;
+ }
+ cmd.rlen = 1;
+ ret = si2157_cmd_execute(client, &cmd);
+ if (ret)
+ goto err;
+ /* query chip revision */
+ /* hack: do it here because after the si2168 gets 0101, commands will
+ * still be executed here but no result
+ */
+ memcpy(cmd.args, "\x02", 1);
+ cmd.wlen = 1;
+ cmd.rlen = 13;
+ ret = si2157_cmd_execute(client, &cmd);
+ if (ret)
+ goto err_kfree;
+ dev->chip_id = cmd.args[1] << 24 |
+ cmd.args[2] << 16 |
+ cmd.args[3] << 8 |
+ cmd.args[4] << 0;
+ dev_info(&client->dev, "found a 'Silicon Labs Si21%d-%c%c%c'\n",
+ cmd.args[2], cmd.args[1], cmd.args[3], cmd.args[4]);
+
+
#ifdef CONFIG_MEDIA_CONTROLLER
if (cfg->mdev) {
dev->mdev = cfg->mdev;
diff --git a/drivers/media/tuners/si2157_priv.h b/drivers/media/tuners/si2157_priv.h
index 2bda903358da..0f4090e184e9 100644
--- a/drivers/media/tuners/si2157_priv.h
+++ b/drivers/media/tuners/si2157_priv.h
@@ -28,6 +28,7 @@ struct si2157_dev {
u8 chiptype;
u8 if_port;
u32 if_frequency;
+ u32 chip_id;
struct delayed_work stat_work;

#if defined(CONFIG_MEDIA_CONTROLLER)
@@ -43,6 +44,13 @@ struct si2157_dev {
#define SI2157_CHIPTYPE_SI2141 2
#define SI2157_CHIPTYPE_SI2177 3

+#define SI2158_A20 ('A' << 24 | 58 << 16 | '2' << 8 | '0' << 0)
+#define SI2148_A20 ('A' << 24 | 48 << 16 | '2' << 8 | '0' << 0)
+#define SI2157_A30 ('A' << 24 | 57 << 16 | '3' << 8 | '0' << 0)
+#define SI2147_A30 ('A' << 24 | 47 << 16 | '3' << 8 | '0' << 0)
+#define SI2146_A10 ('A' << 24 | 46 << 16 | '1' << 8 | '0' << 0)
+#define SI2141_A10 ('A' << 24 | 41 << 16 | '1' << 8 | '0' << 0)
+
/* firmware command struct */
#define SI2157_ARGLEN 30
struct si2157_cmd {
diff --git a/drivers/media/usb/dvb-usb-v2/af9035.c b/drivers/media/usb/dvb-usb-v2/af9035.c
index 3afd18733614..5b7a00cdcbd8 100644
--- a/drivers/media/usb/dvb-usb-v2/af9035.c
+++ b/drivers/media/usb/dvb-usb-v2/af9035.c
@@ -1206,7 +1206,50 @@ static int it930x_frontend_attach(struct dvb_usb_adapter *adap)
struct si2168_config si2168_config;
struct i2c_adapter *adapter;

- dev_dbg(&intf->dev, "adap->id=%d\n", adap->id);
+ //dev_dbg(&intf->dev, "adap->id=%d\n", adap->id);
+ dev_dbg(&intf->dev, "%s adap->id=%d\n", __func__, adap->id);
+
+ /* I2C master bus 2 clock speed 300k */
+ ret = af9035_wr_reg(d, 0x00f6a7, 0x07);
+ if (ret < 0)
+ goto err;
+
+ /* I2C master bus 1,3 clock speed 300k */
+ ret = af9035_wr_reg(d, 0x00f103, 0x07);
+ if (ret < 0)
+ goto err;
+
+ /* set gpio11 low */
+ ret = af9035_wr_reg_mask(d, 0xd8d4, 0x01, 0x01);
+ if (ret < 0)
+ goto err;
+
+ ret = af9035_wr_reg_mask(d, 0xd8d5, 0x01, 0x01);
+ if (ret < 0)
+ goto err;
+
+ ret = af9035_wr_reg_mask(d, 0xd8d3, 0x01, 0x01);
+ if (ret < 0)
+ goto err;
+
+ /* Tuner enable using gpiot2_en, gpiot2_on and gpiot2_o (reset) */
+ ret = af9035_wr_reg_mask(d, 0xd8b8, 0x01, 0x01);
+ if (ret < 0)
+ goto err;
+
+ ret = af9035_wr_reg_mask(d, 0xd8b9, 0x01, 0x01);
+ if (ret < 0)
+ goto err;
+
+ ret = af9035_wr_reg_mask(d, 0xd8b7, 0x00, 0x01);
+ if (ret < 0)
+ goto err;
+
+ msleep(200);
+
+ ret = af9035_wr_reg_mask(d, 0xd8b7, 0x01, 0x01);
+ if (ret < 0)
+ goto err;

/* I2C master bus 2 clock speed 300k */
ret = af9035_wr_reg(d, 0x00f6a7, 0x07);
@@ -2118,6 +2161,8 @@ static const struct usb_device_id af9035_id_table[] = {

/* IT930x devices */
{ DVB_USB_DEVICE(USB_VID_ITETECH, USB_PID_ITETECH_IT9303,
+ { DVB_USB_DEVICE(USB_VID_DEXATEK, 0x0100,
+ &it930x_props, "Logilink VG0022A", NULL) },
&it930x_props, "ITE 9303 Generic", NULL) },
{ DVB_USB_DEVICE(USB_VID_AVERMEDIA, USB_PID_AVERMEDIA_TD310,
&it930x_props, "AVerMedia TD310 DVB-T2", NULL) },
--
2.20.1